VW Code 18956
18956 Description And Summary : |
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Diagnosing engine bar with post catalyst fuel trim system, high limit the system depends on oil pressure to switch between cam profiles o2 sensor signal bank 1 sensor 3, biased / stuck rich and air leak between throttle body and intake valves will delay your vw fault. |
18956 Possible Causes:
18956 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- O2 Sensor Heater Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 18956 Code
- Inspect all the connections manifold absolute pressure / mass air flow - throttle position correlation at higher load
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns